What is CVE-2025-45842?

CVE-2025-45842 is a high-severity vulnerability in Totolink Nr1800x, classified under Out-of-bounds Write. CVSS score: 8.8/10. Published 2025-05-08.

How severe is CVE-2025-45842?

High severity. CVSS v3 base score is 8.8 out of 10.

Is CVE-2025-45842 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Buffer overflow in Totolink Nr1800x

CVE-2025-45842

TOTOLINK NR1800X V9.1.0u.6681_B20230703 was discovered to contain an authenticated stack overflow via the ssid5g parameter in the setWiFiEasyCfg function.

Vulnerability class: Buffer Overflow

Published 2025-05-08 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.009 (57.4th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 57th percentile — 57.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.009 · newest: 0.009 · change: +0.000

Affected products

Totolink Nr1800x
Totolink Nr1800x Firmware — versions 9.1.0u.6681_b20230703

Weakness classification (CWE)

Public proof-of-concept exploits

fkie-cad/nvd-json-data-feeds

References

www.totolink.net/ (Product)
www.totolink.net/home/menu/detail/menu_listtpl/download/id/225/ids/36.html (Product)
github.com/regainer27/CVE-key/tree/main/bo3 (Exploit)

Frequently asked questions

What is CVE-2025-45842?: CVE-2025-45842 is a high-severity vulnerability in Totolink Nr1800x, classified under Out-of-bounds Write. CVSS score: 8.8/10. Published 2025-05-08.
How severe is CVE-2025-45842?: High severity. CVSS v3 base score is 8.8 out of 10.
Is CVE-2025-45842 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.